Module coverage 

Code coverage integration for fastapi_rust.

This module provides coverage tracking and reporting infrastructure for testing fastapi applications. It integrates with cargo-llvm-cov for line-level coverage and provides per-endpoint coverage tracking.

Features

• Endpoint coverage tracking: Track which routes are tested
• Branch coverage hints: Track error paths and edge cases
• Threshold enforcement: Fail tests if coverage drops below threshold
• Report generation: JSON, HTML, and badge formats

Example

use fastapi_core::coverage::{CoverageTracker, CoverageConfig};

// Create a coverage tracker
let tracker = CoverageTracker::new();

// Run tests with tracking
let client = TestClient::new(app).with_coverage(&tracker);
client.get("/users").send();
client.post("/users").json(&user).send();

// Generate report
let report = tracker.report();
report.assert_threshold(0.80); // Fail if < 80% coverage
report.write_json("coverage.json")?;
report.write_html("coverage.html")?;

CI Integration

Use with cargo-llvm-cov for full line-level coverage:

# Install coverage tools
cargo install cargo-llvm-cov

# Run with coverage
cargo llvm-cov --html --open

# CI: Check threshold
cargo llvm-cov --fail-under-lines 80

Structs

BranchHits

Branch coverage for specific code paths.

CoverageConfig

Configuration for coverage tracking.

CoverageReport

Coverage report with statistics and utilities.

CoverageTracker

Tracks endpoint coverage during test execution.

EndpointHits

Endpoint hit statistics.

Enums

OutputFormat

Output format for coverage reports.